South America called them; explorations of the great naturalists - Von Hagen, Victor Wolfgang, 1908- (London : R. Hale, 1949)
Keywords: Humboldt, Alexander, -- Freiherr von, -- 1769-1859.; Darwin, Charles, -- 1809-1882.; La Condamine. -- Charles Marie de, 1701-1774.; Spruce, Richard, 1817-1803.; South America -- Description and travel